Technical data sheet ASOFLEX-SDM Elastic PU sealing compound
Areas of application / surface protection For sealing pipe penetrations, floor drains and end profiles
Product features Two component Solvent free Thixotropic watertight Temperature change resistant Resistant to weakly concentrated acids and alkaline solutions
Advantages Elastic High adhesion force Versatile
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04/06/2025
Technical data sheet ASOFLEX-SDM Technical Data Material properties Product components Base material Density, ready to use product (ISO 1183-1) Shore-A hardness (ISO 868) Viscosity, ready to use product
2 component system polyurethane resin approx. 1.45 g/cm³ approx. 90 Filler consistency
Mixing Mix ratio, component A Mix ratio, component B Mixing time
6 weight proportion 1 weight proportion approx. 3 minutes
Application Substrate temperature Max. relative humidity Pot life Minimum reaction temperature Consumption
Hardening time / full resilience
approx. 10 - 35 °C 80 % approx. 45 minutes min. 10 °C Primer: 0.3 - 0.5 kg/m² + quartz sand (Ø 0.1 - 0.6) approx. 1000 g/m² | Adhesive primer: approx. 10 ml/m² | Sealing: approx. 1.45 kg/l approx. 7 days
Processing equipment Aids/tools Filler Flat trowel Stirrer (approx. 300 rpm) Protective gloves
Suitable substrate Cement plaster Concrete Cement-based screed (CT) Metallic surfaces
Preparing the substrate Requirement for substrate 1. Dry 2. Firm 3. Load-bearing 4. Grippy 5. Free of adhesion inhibiting substances 6. Protected from the effects of moisture penetration on the rear side
Measures for substrate preparation Substrate preparations must be carried out in compliance with DIN EN 14879-1:2005, 4.2 et.seq.
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Technical data sheet ASOFLEX-SDM Substrate quality class Quality/surface cleanliness
Tensile adhesion strength
Age
Moisture content
Concrete
min. C20/25
≥ 1,5 N/mm²
min. 28 days
<4% (CM method)
Screed
min. CT-C25-F4 in accordance with DIN EN 13813
Plaster
min. P Ill a / P Ill b
≥ 0,8 N/mm²
Steel
min. SA 2 1/2 in accordance with DIN EN ISO 12944
Preparing the details 1. Clean and degrease flanges. 2. Evenly prime flanges and non-absorbent substrates (plastic, PVC, ABS, stainless steel) with INDU-PRIMER-N.
Preparing the surface 1. Prime absorbent substrates with ASODUR-GBM in two application steps until pore sealed. 2. Sprinkle the fresh, final priming coat with quartz sand (Ø 0.1-0.6 mm).
Application Mixing 1. The (ideal) material temperature during the mixing procedure is +15 °C. 2. Mix the resin homogeneously in the original container. 3. Add the hardener to the resin. 4. The hardener must run completely out of the container. 5. Mix thoroughly with the mixer until a homogeneous consistency. 6. The hardener must be distributed evenly. 7. The mixing time is ca. 3 minutes. 8. Decant the mass into a clean bucket. 9. Stir carefully again.
Application 1. Fill the area to be sealed with ASOFLEX-SDM free of voids. 2. Then sand the surfaces properly. 3. Remove excess sand after hardening.
Cleaning tools Clean tools immediately after use with suitable solvent.
Storage conditions Storage Store in a frost-free, cool and dry place. At min. 10 - 25 °C for 12 months in the original canister. Promptly use opened container. Any signs of crystallization can be eliminated in a water bath at +50 to +60 °C within approx. 2 hours, after which the material can be reused Storage must be performed in accordance with the directive on substances that are harmful to water. The reactivity may decrease with extended storage.
Disposal Hardened product leftovers can be disposed of in accordance with disposal code AVV 15 01 06.
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Technical data sheet ASOFLEX-SDM Notes The indicated consumption quantities are calculated values without additions for textured surface roughness and absorbency, level compensation and residual material in the container. We always recommend a calculated safety addition of 10% on top of the calculated consumption quantities. Higher temperatures shorten the pot life. Lower temperatures increase the application and hardening times. The bonding between the individual layers can be strongly disrupted between the individual application steps due to the effects of dampness and contamination. Coating work requires a substrate temperature of at least 3 °C above the dew point temperature. After they have been applied, surface protection systems must be protected against dampness (e.g. rainwater, condensation water) for approx. 4–6 hours. Moisture causes a white colour and/or stickiness on the surface and can cause problems during hardening. Discoloured and/or sticky surfaces must be removed and reworked, e.g. through grinding or shot blasting. Protect surfaces that are not to be treated from the effects of ASOFLEX-SDM! If an extended waiting time occurs between the individual application steps, clean the old surface well and cut it off with a cutter blade. Subsequently perform a complete rework. Observe the technical data sheets of the products mentioned before starting work. Applications that have not been clearly mentioned in this technical data sheet may only be carried out after the technical service department of SCHOMBURG GmbH has been consulted, and after the said department has approved of such a course of action in writing. For detailed information on application, read and observe supplementary technical information no. 19 "Applying ASODUR® products".
Relevant regulations The recognised standards of construction engineering, the relevant guidelines and current regulations must be observed. Observe applicable safety data sheet! GISCODE: PU40
The rights of the buyer with regard to the quality of our materials are based on our terms and conditions of sale and delivery. Our technical advice team will be happy to advise you in the case of requirements that exceed the scope of the application described here. In order to be binding, a legally binding written confirmation is required. The product description does not release the user from a duty of care. Lay a test area in the event of uncertainty. This version becomes invalid in the event of a new version being issued.
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