Ardex DPM1C One Coat Damp Proof Membrane


From: £146.40 inc. VAT
£122.00 ex. VAT

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  • Suitable For: damp proofing floors
  • Area of use: INT
  • Application Method: trowel
  • Time to full cure: 6 hours
  • Volume: 6kg 10kg 25kg
  • Container Type: tin
  • Type: damp proofing
  • Colour: black
  • Brand: Ardex
  • Manufactuer: Ardex
  • Box Size: 1
Data Sheets

Download Safety Sheet

Download Tech Data

 

ARDEX DPM 1 C is a high-performance, one-coat, solvent-free, low-viscosity, two-component epoxy resin designed for robust damp proofing applications. Once hardened, ARDEX DPM 1 C forms a durable membrane capable of withstanding hygrometer readings of up to 98% relative humidity (RH) while offering exceptional bond strength. This epoxy resin exhibits excellent resistance to water, grease, oil, aqueous salt solutions, and dilute mineral and organic acids, making it an ideal choice for various demanding environments. ARDEX DPM 1 C is specifically formulated to either create a damp proof membrane or suppress residual moisture in sound, well-compacted concrete slabs and cement/sand screeds.

Key Points:

  1. High Moisture Resistance: ARDEX DPM 1 C effectively accommodates hygrometer readings up to 98% RH, providing reliable protection against moisture in concrete slabs and cement/sand screeds.
  2. Versatile Application: Can be used as a damp proof membrane where a structural damp proof membrane is absent or ineffective, or to suppress residual moisture in well-compacted surfaces with readings up to 92% RH.
  3. Durable and Resistant: Offers excellent resistance to water, grease, oil, aqueous salt solutions, and dilute mineral and organic acids, ensuring long-lasting protection in various environments.
  4. Suitable for Heated Floors: ARDEX DPM 1 C is compatible with heated concrete and cement/sand screeds, provided the surface temperature does not exceed 27°C, in compliance with BS 8203 and BS 5325 standards.

 

Storage Instructions Store ARDEX DPM 1C in dry conditions. When kept in its original, unopened containers, it has a shelf life of at least 12 months.

 

 

 

For more in our range of damp proofers, click here. To shop our full Ardex range, click here.

Alternatively, you can visit the Ardex website here.

 

 

ARDEX DPM 1 C is specifically designed to serve as a damp proof membrane or to reduce residual moisture in well-compacted and sound concrete slabs and cement/sand screeds with hygrometer readings of up to 98% RH. It can be applied as a damp proof membrane in situations where a structural damp proof membrane is either absent or ineffective, addressing the risk of ground moisture. For suppressing residual moisture, a thinner application can be used on well-compacted concrete slabs and cement/sand screeds with readings up to 92% RH. Additionally, ARDEX DPM 1 C is suitable for use on Calcium Sulphate screeds with readings up to 90% RH, provided specific criteria are met. It is also compatible with heated concrete and cement/sand screeds, as long as the surface temperature does not exceed 27°C, in accordance with BS 8203 and BS 5325 standards.

 

Substrate Preparation

Before applying ARDEX DPM 1 C, ensure that the concrete or screed substrate is hard, sound, and free from dust, laitance, dirt, and any other materials that could prevent adhesion, such as paint, lime coatings, plaster, and adhesive residues. Any existing screeds or levelling and smoothing compounds that are not moisture-resistant must also be removed. Concrete curing agents, admixtures, surface hardeners, and their residues can impair adhesion and should be thoroughly removed. Contaminated or very smooth substrates should be prepared using appropriate mechanized surface preparation equipment. After mechanical preparation, thoroughly remove dust and fines by brushing combined with effective industrial vacuum extraction. The substrate should be prepared to a depth that exposes the aggregate and provides a sound, hard surface ready for treatment. Very uneven, rough, or porous surfaces may reduce the coverage of ARDEX DPM 1 C; in such cases, pre-smoothing with ARDITEX NA is recommended.

Calcium Sulphate-Based Screeds

For calcium sulphate screeds with moisture readings greater than 75% RH, ARDEX DPM 1 C may be used if the following conditions are met:

  1. The screed manufacturer confirms that their screed can receive an epoxy DPM.
  2. The subfloor contains an effective damp proof membrane, ensuring that any remaining moisture is from the construction process and not rising from the ground.
  3. The screed has been down for more than 28 days and has a surface tensile strength of at least 1.0 N/mm² for smoothing applications up to 6mm thick.
  4. The moisture content is less than 1.5% w/w or below 90% RH.
  5. There is no underfloor heating installed.
  6. No timber flooring is to be bonded to the screed.

If these criteria are met, apply ARDEX DPM 1 C at a minimum thickness of 350 microns to the prepared substrate. Smooth with 3mm-6mm ARDITEX NA, which must be applied within 48 hours of applying ARDEX DPM 1 C.

Movement Joints

Any joints or cracks in the floor that are subject to movement, such as structural movement joints, must not be bridged with ARDEX DPM 1 C. These joints should be treated with a flexible, impervious jointing system and carried through to the final floor finish before applying the damp proof membrane. Non-moving cracks in the screed should be fully stitched and filled with an appropriate resin system before applying the damp proof membrane. For more details, consult the ARDEX P 10 SR datasheet.

Applications Over Underfloor Heating

For applications over underfloor heating, ensure that the cementitious levelling screed has been laid according to BS 8204 Part 1. The underfloor heating system should be commissioned as per the manufacturer’s instructions and BS 8204 Part 1. After thermal cycling and commissioning, turn off the underfloor heating system 48 hours before and after installing ARDEX DPM 1 C, the smoothing compound, and the final floor covering. Gradually re-commission the system to avoid rapid thermal shock and temperature variations.

Mixing

ARDEX DPM 1 C comes with pre-gauged resin and hardening agents in their original containers. To mix, add the hardening agent (Component B) to the resin (Component A) and thoroughly mix using a spiral mixing paddle attached to a slow-speed drill until the mixture reaches a uniform color and consistency. Ensure all resin components are fully mixed. To reduce unmixed residues, pour some of the mixed material into the Component B container, mix for 30 seconds, then pour it back into the main mix in the Component A container and continue mixing. ARDEX DPM 1 C is ready for immediate use and has a working time of 20 minutes at 20°C. This working time is shorter at higher temperatures and longer at lower temperatures. At higher temperatures, spread ARDEX DPM 1 C immediately after mixing, as the exothermic reaction will reduce working time if the material remains in the container. Apply at temperatures above 10°C. Note: Back mixing ensures no unreacted material remains and allows for the safe disposal of packaging as non-hazardous waste.

Application

Apply an even coat of the mixed ARDEX DPM 1 C using a suitable V-shaped notched trowel over the designated area (refer to the table below for guidance). While the ARDEX DPM 1 C is still wet, flatten the serration ridges with a long-handled short-pile paint roller, which should be pre-wetted with the mixed ARDEX DPM 1 C.

 

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Elementlength
up to
1,5 m 		up to
2,5 m 		up to
3,5 m 		up to
4,5 m 		up to
2,5 m 		up to
3,5 m 		up to
4,5 m
Type of window frame material Minimum witdth of joints
for a butled mounting b in mm 		Minimum witdth of joints
for a inner mounting b in mm
Hard PVC (white) 10 15 20 25 10 10 15
Hard PVC and PMMA (dark)
(colour extruded) 		15 20 25 30 10 15 20
Hard PUR integral foam 10 10 15 20 10 10 15
Wood-aluminium-window 10 10 15 20 10 10 15
Aluminium-plastic sandwich
frame (bright) 		10 10 15 20 10 10 15
Aluminium-plastic sandwich
frame (dark) 		10 15 20 25 10 10 15
Wooden window frame 10 10 10 10 10 10 10

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