Recommended Coatings For Excalibur Thermally Modified Wood


DIY Paints & Primers

Sherwin Williams “Infinity”: Interior One-Coat Paint & Primer. 100% Acrylic Latex (water base)

Sherwin Williams “WeatherShield”: Exterior Once Coat Paint Primer. 100% Acrylic Latex (water base)


Valspar “Reserve”: Interior / Exterior One Coast Paint & Primer. 100% Acrylic (water base)

Valspar “Duramax”: Exterior One Coat Paint & Primer. 100% Acrylic Latex (water base)

Valspar “SeasonPLUS”: Exterior One Coat Paint & Primer. 100% Acrylic Latex (water base)


Behr “Premium Plus Flat #4050”: Exterior Top Coat. 100% Acrylic Latex (water base)

Behr “Premium Plus Ultra Flat #4850”: Exterior Top Coat. 100% Acrylic Latex (water base)

Behr “Marquee Flat # 4450”:Exterior Top Coat. 100% Acrylic Latex (water base)

Behr “#436 Primer / Sealer”: Primer / Sealer Coat (water base)


Commercial Two Coat Paint Systems

Sherwin Williams “Super Paint Machine Finish Alkyd Primer” (oil base)

Sherwin Williams “Super paint Exterior Latex Satin” (water base)

Sherwin Williams “Super Paint Machine Finish Latex Primer” (water base)

Sherwin Williams “Super Paint Exterior Latex” (water base)


Commercial Stains

Sherwin Williams “WoodScape Exterior Acrylic Solid Color Stain” (water base)

Sherwin Williams “WoodScape Exterior Polyurethane Semi-Transparent Stain” (water base – polyurethane) 

Sherwin Williams “SuperDeck Oil Based Semi-Transparent Stain” (oil base)

Sherwin Williams “SuperDeck Oil Based Transparent Stain” (oil base)

Penofin “Architectural Solid Acrylic Stain” (water base / alkyd – urethane)





Test Report No: RJ3038-1 Date: March 11, 2014

Sample ID: The Test Samples are identified as Excalibur Siding, Thermally Modified, nominal 1” x 6”.

Sampling Detail: Test Samples were submitted to the laboratory directly by the client. No special sampling Conditions or sample preparation were observed by QAI.

Date of receipt: Samples were received at QAI on March 6, 2014.

Authorization: Testing authorized by Harvey Hetfeld.

Test Requested: Perform standard flame spread and smoke density developed classification tests on the sample supplied by the Client in accordance With ASTM Designation E84-13a, “Standard Method of Test for Surface Burning Characteristics of Building Materials”. The foregoing Test procedure is comparable to UL 723, ANSI?NFPA No. 255, and UBC No. 8-1.

Test Results:   Flame Spread : 50  Smoke Developed : 175

Detailed test results are presented in the subsequent pages of this report and can be presented to you on request.

Conclusion: The submitted material meets the requirements for a “Class B” Flame Spread. See Classification requirements on page 2.

Summary of ASTM E84 RESULTS: Because of the possible variations, the results are adjusted to the nearest figure divisible by 5. Smoke Density values over 200 are rounded to the nearest figure divisible by 50. In order to obtain the Flame Spread Classification, the results should be compared to the following table:


IGNITION: 37 seconds

FLAME FRONT: 16 feet maximum


TEST DURATION: 10 minutes

CALCULATION: 94.92×0.515=48.88


A A 0 through 25 Less than or equal to 450
B B 26 through 75 Less than or equal to 450
C C 76 through 200 Less than or equal to 450





Subject of the contract was a durability test of two variants of thermally modified Radiata pine against wood decay

Basidiomycetes according to the laboratory test DIN CEN/TS 15083-1:2005.

2) Test Material

Two variants of Thermally Modified Radiata Pine with the following treatment specifications were tested:

TMT 1: 220 Degree, 2 hours, (200 x 22 x 494) mm^3

TMT2: 230 Degree, 2 hours, (200 x 25 x 500) mm^3

For each variant 12 boards from 3 batches were delivered by the client. Specimens were taken from each 3 boards per batch.

3) Test Performance

Test Procedure:  Durability test according to CEN/TS 15083-1:2005

Test Fungi:   Coniophora puteana BAM Ebw. 15 (DSM 3085) Poria placenta BAM FPRL 280

Reference Wood:   Pinus sylvestris L. (Scots pine), mean raw density after kiln drying: 462 kg/m^3

Replicates:   30 Specimens for each test fungus

Dimension of specimens:   30 specimens for each test fungus

Accelerated aging procedure:   Water leaching according to DIN EN 84:1997-05

Sterilization:   Water damp

Duration of the test (fungal attack):   16 weeks (09.03.17-29.06.17)

4) Validity of the test

Table 1 shows the mean dry mass losses of the reference specimens with the two test fungi. The corresponding single values are

given in the annex, table A5 and A6.

Table 1: Virulence values

Test fungus Mean mass loss (n=20) Demanded mass loss according to DIN CEN/TS 15083-1:2005
Coniophora puteana on Scots pine 32.1% > = 30%
Poria placenta on Scots pine 26.4% > = 20%

The test was valid, because values of the average mass losses were exceeded by all test fungi.

5) Results

The mean mass losses, caused by fungal attack, as well as the corresponding durability classes (DC)

are given in table 2. Single values are listed in the annex, tables A1 to A4. The durability

class was determined according to table 3

Table 2: Mass losses and corresponding durability classes of thermally modified Radiata pine

Prufmaterial Mean dry mass loss [%] Median value of dry mass loss [%] Durability class Mean dry mass loss [%] Median value of dry mass loss [%] Durability class
TMT 1: 220 degree c 2.54 (n=30) 1.84(n=30) 1 12.39 (n=30) 12.27 (n=30) 3
TMT 2:

230 degree c

0.04 (n=30) 0.00 (n=30) 1 2.48 (n=30) 2.98 (n=30) 1
reference wood (Scots pine) 32.12 (n=20) 30.70 (n=20) 1 26.44 (n=20) 25.06 (n=20) 4

Table 3: Classification of durability based on laboratory test

DC Description Median dry mass loss [%] according to Din CEN/TS 15083-1
1 Very Durable ≤ 5
2 Durable > 5 bis ≤ 10
3 Moderately durable > 10 bis ≤ 15
4 Slightly durable > 15 bis ≤ 30
5 Not durable > 30


Durability classification is based on the results with the fungus, which caused the highest mass loss. Due to the results listed in table 2, the material “TMT 1: 220°C” is classified as DC 3 (moderately durable) and material “TMT 2: 230°C” achieved DC 1 (very durable).