2007 & 2012 Crawl Space Membrane Adhesive Test
Four typical crawl space membranes are listed below.
In the left column are commonly available sealant materials. Each of the
sealants was used to adhere 6" by 6" pieces of the different membranes to a concrete
masonry block. After the membranes had two weeks to dry the holding power of
each adhesive was measured in pounds of pressure. The higher the
number the great number of pounds of pulling pressure was required to
remove the membrane from the concrete block. Note that some
adhesives work excellent for one type of membrane but have little
holding power for another type of membrane. This test is only an
approximation of the holding power of each adhesive.
PDF of Adhesive Test
|
Caulks/Glues |
Reinforced
6 mil
Poly |
Rufco 400 black side
4.5 mil |
Rufco 400 white side 4.5 mil |
Dura Skrim
black side
6 mil |
Dura Skrim
white side
6 mil |
EPDM
45 mil reinforced |
|
Titebond Radon Sealant |
< 1 |
5 |
3 |
2 |
1 |
|
|
Eternabond Adhesive Tape |
16 |
23 |
22 |
27 |
26 |
|
|
Nuflex 110 Sealant Butylique |
18 |
6 |
5 |
25 |
25 |
9 |
|
Dupont Siliconized Acrylic Airtite |
8 |
16 |
30 |
2 |
30 |
|
|
Geocell 3300 |
1 |
5 |
4 |
2 |
1 |
60 |
|
Geocell 2000 |
30 |
4 |
5 |
< 1 |
5 |
55 |
|
Pecora Dynatrol i-XL |
< 1 |
4 |
4 |
4 |
1 |
60 + |
|
Loctite PL300 |
< 1 |
3 |
4 |
1 |
1 |
|
|
CRL Polyurethane M66L |
< 1 |
6 |
6 |
1 |
1 |
60 + |
|
Loctite Power Grab |
< 1 |
< 1 |
< 1 |
< 1 |
< 1 |
|
|
Liquid Nails Heavy Duty Const. Adhesive |
< 1 |
2 |
1 |
< 1 |
< 1 |
16 |
|
Sika Const. Adhesive Urethane |
< 1 |
< 1 |
< 1 |
< 1 |
< 1 |
10 |
|
Sika Const. Sealant Urethane |
< 1 |
< 1 |
< 1 |
< 1 |
< 1 |
30 |
|
PurStick Professional Gun Foam |
< 1 |
< 1 |
< 1 |
< 1 |
< 1 |
10 |
Color Coding Speed Bits
We use speed bits in portable drills
to quickly change bits from Philips, to drill bit, to 1/4” nut driver to
5/16” nut driver. We love the DeWalt 9 volt battery drill because it
has plenty of power for these small chores and its light enough to carry
in a side pouch on our tool belt. I have no use for 14 and 18 volt
drills. They are too heavy. We do use an 18 volt sawzall for cutting
through the roof and I would consider a 24 volt hammer drill for test
holes through the slab. My tip however is for the small speed bits.
They are small enough that they get lost in the grass when they fall out
of your pouch and you tend to fumble around for them in a pouch or tool
box. Go to the electrical department of home depot and buy 4 different
colored bright tapes. Decide on which color is for which speed bit and
wind a few wraps of colored tape around that style. We use blue for
5/16 nutdriver, red for 1/4 nutdriver, Purple for #2 philips, white for
#1 philips. Now we can quickly grab the correct bit and when it drops
in the grass it is easier to spot.
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