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1C liquid plastic Pro
1C liquid plastic Pro

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1C liquid plastic Pro

Single-component solvent-free liquid plastic for standard sealing for use in odour-sensitive areas

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Available in 4 versions

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  • Solvent and isocyanate-free

  • Low-emission and easy-to-use

  • Thixotropic (the fluid becomes thinner as it is deformed/mixed)

  • Highly elastic

  • UV-resistant

  • Alkali-resistant

  • Resistant to hydrolysis

  • Rainproof after approx. 60 min

  • Low SD value (approx. 2 m)

  • Partial amounts can be removed so that remaining material does not need to be disposed of

  • High storage stability


Fire protection


  • BROOF (t1); BROOF (t2); BROOF (t3);BROOF (t4) to DIN EN 13501-5

  • Class E to DIN EN 13501-1
Proof of Performance
  • ETAG 005: ETA-19/0108. Guideline for the European Technical Approval for liquid roof seals

  • General test certificates from construction authorities for waterproofing buildings indoors and outdoors as well as for use on surfaces inclined at up to 90°.

  • DIN 18531 Waterproofing of roofs, balconies and walkways

  • DIN 18532 Waterproofing of concrete areas trafficable by vehicles

  • DIN 18533 Waterproofing of elements in contact with soil

  • DIN 18535 Waterproofing of tanks and pools
Base materialPre-treatmentPrimer
ScreedsGrinding, millingnot required
Glass*Cleaning of the surface with acetone cleaner; roughening of the surfacenot required
Hot bitumen paint*not requiredBitumen primer
WoodRemove paintnot required
Cold bitumen paint*not requiredBitumen primer
Plastic sheeting (EPDM)Cleaning of the surface with acetone cleanerBitumen primer
Plastic sheeting (EVA)Cleaning of the surface with acetone cleanerHard PVC primer
Plastic sheeting (PIB)*Cleaning of the surface with acetone cleaner; roughening of the surfaceBitumen primer
Plastic sheeting (PVC-P, NB)Cleaning of the surface with acetone cleaner; roughening of the surfaceSoft PVC primer
Plastic sheeting (TPO, FPO)Clean the surface with acetone cleaner; roughen the surfaceSpecial primer
Lightweight concreteClean the surface with acetone cleaner; roughen the surfacenot required
Powder-coated metals*Dry cleaning of the surface; roughening of the surfaceRust-Stop Quattro
Plaster/masonryremove paint if necessarynot required
Mortar, plastic-modifiedGrinding, millingnot required
Polymer bitumen membranes (PYE-E) mod. (SBS)not requiredBitumen primer
Polymer bitumen membranes (PYP) mod. (APP)*not requiredBitumen primer
PVC moulded parts, hardCleaning of the surface with acetone cleanerHard PVC primer
Steel, zinc-platedCleaning of the surface with acetone cleaner; roughening of the surfaceRust-Stop Quattro
Composite thermal insulation systems*not requirednot required
Other base materials on request
*Perform adhesion and compatibility tests
**Alternatively without roughening after adhesion test with CONNECTION primer
AluminiumClean the surface with acetone cleaner, roughen the surfaceRust Stop Quattro
Paints*Grinding, remove completelyDependent on substrate
AsphaltGrinding, millingBitumen primer
ConcreteGrinding, millingnot required
Stainless steelCleaning of the surface with acetone cleaner; roughening of the surfaceRust-Stop Quattro
Anodised aluminium**Cleaning of the surface with acetone cleaner; roughening of the surfaceRust-Stop Quattro
Air temperatureDew point temperatures in °C at a relative humidity of
12°C0,351,843,194,465,636,747,758,699,6010,4811,33
14°C2,203,765,106,407,588,679,7010,7111,6412,5513,36
15°C3,124,656,077,368,529,6310,7011,6912,6213,5214,42
16°C4,075,596,988,299,4710,6111,6812,6613,6314,5815,54
17°C5,006,487,929,1810,3911,4812,5413,5714,5015,3616,19
18°C5,907,438,8310,1211,3312,4413,4814,5615,4116,3117,25
19°C6,808,339,7511,0912,2613,3714,4915,4716,4017,3718,22
20°C7,739,3010,7212,0013,2214,4015,4816,4617,4418,3619,18
21°C8,6010,2211,5912,9214,2115,3616,4017,4418,4119,2720,19
22°C9,5411,1612,5213,8915,1916,2717,4118,4219,3920,2821,22
23°C10,4412,0213,4714,8716,0417,2918,3719,3720,3721,3422,23
24°C11,3412,9314,4415,7317,0618,2119,2220,3321,3722,3223,18
25°C12,2013,8315,3716,6917,9919,1120,2421,3522,2723,3024,22
26°C13,1514,8416,2617,6718,9020,0921,2922,3223,3224,3125,16
27°C14,0815,6817,2418,5719,8321,1122,2323,3124,3225,2226,10
28°C14,9616,6118,1419,3820,8622,0723,1824,2825,2526,2027,18
29°C15,8517,5819,0420,4821,8322,9724,2025,2326,2127,2628,18
30°C16,7918,4419,9621,4423,7123,9425,1126,1027,2128,1929,09
32°C18,6220,2821,9023,2624,6525,7927,0828,2429,2330,1631,17
34°C20,4222,1923,7725,1926,5427,8528,9430,0931,1932,1333,11
36°C22,2324,0825,5027,0028,4129,6530,8831,9733,0534,2335,06
38°C23,9725,7427,4428,8730,3131,6232,7833,9635,0136,0537,03
40°C25,7927,6629,2230,8132,1633,4834,6935,8636,9838,0539,11
45°C30,2932,1733,8635,3836,8538,2439,5440,7441,8742,9744,03
50°C34,7636,6338,4640,0941,5842,9944,3345,5546,7547,9048,98
The dew point table indicates at which surface temperatures condensation occurs. This is determined by the air temperature and relative humidity. Example: At an air temperature of 20°C and 55 % relative humidity, the dew point is at an object temperature of +10.7°C. The surface temperature should be 3°C above the dew point during application.
°C45 %50 %55 %60 %65 %70 %75 %80 %85 %90 %95 %
2°C-7.77-6.56-5.43-4.40-3.16-2.48-1.77-0.98-0.260,471,20
4°C-6.11-4.88-3.69-2.61-1.79-0.88-0.090,781,622,443,20
6°C-4.49-3.07-2.10-1.05-0.080,851,862,723,624,485,38
8°C-2.69-1.61-0.440,671,802,833,824,775,666,487,32
10°C-1.260,021,312,533,744,795,826,797,658,459,31
  • ETAG 005: ETA-19/0108. Guideline for the European Technical Approval for liquid roof seals

  • General test certificates from construction authorities for waterproofing buildings indoors and outdoors as well as for use on surfaces inclined at up to 90°.

  • DIN 18531 Waterproofing of roofs, balconies and walkways

  • DIN 18532 Waterproofing of concrete areas trafficable by vehicles

  • DIN 18533 Waterproofing of elements in contact with soil

  • DIN 18535 Waterproofing of tanks and pools

The usage instructions are recommendations based on the tests we have conducted and our experience; carry out your own tests before each application. Due to the large number of applications and storage and processing conditions, we do not assume any liability for a specific application result. Insofar as our free customer service provides technical information or acts as an advisory service, no responsibility is assumed by this service except where the advice or information given falls within the scope of our specified, contractually agreed service or the advisor was acting deliberately. We guarantee consistent quality of our products. We reserve the right to make technical changes and further develop products.



The DIN standards, regulations, technical regulations and recognised codes of practice applicable to the relevant trades must be observed, e.g. DIN 18195, DIN 18531, the technical regulations for metalwork in the roofing trade and the technical regulations for seals—the flat roof directive—issued by the ZVDH (German central association for the roofing trade). Würth accepts no liability relating to any application or implementation which is not specified by a standard, a technical regulation or the Würth work instructions, or which does not correspond to the recognised codes of practice.